According to the speaker, why are changes being made?

Question 86 - 88 refer to following paragraph:M: Hello, everyone. (86) I’d like to announce a few changes in our procedure that are designed to save us money. Firstly, we will no longer be sending statements to clients through the post. We’ll be using email to send monthly statements. (87) It is a simple procedure, and when the software is installed I don’t think you will need any training. The system is very straightforward. We are also renting out the catering room and installing some refrigerators in the cafeteria, (88) so you will have to start bringing your own lunches to work.
86. According to the speaker, why are changes being made?